Regulus uREG, User Manual

Page: 15 / 107

uREG User Manual
15
Dependent overcurrent protection
Activity and mode of the dependent criterion RI > inactive, OW
Overcurrent-stage starting current I> 0.3...50 A
Time delay of 2-fold overcurrent tI> 0.05...24 s
Slope of the dependent characteristic curve wtI > moderate,
standard, rapid
Short-circuit overcurrent protection
Tripping current setting range I> 0.1 ÷ 50 A
Internal operate time time for 2-fold overcurrent value 20 ÷ 50 ms (typical 35 ms)
Adjustable resetting ratio 0.910 ÷ 0.985
Differential overcurrent protection
Internal operate time for 2-fold overcurrent value 15 ÷ 40 ms (typical 22 ms)
Internal operate time with harmonic lock-out 25 ÷ 50 ms (typical 30 ms)
Inrush stabilization (harmonic restraint deviation) +- 10%
Overvoltage protection [VT-0, VT-2, VT-3]
Line-to-line operating voltage of overvoltage protection U> 5 ÷ 130 V
Internal operate time for 2-fold value of exceeded setting 20 ÷ 50 ms (typical 35 ms)
Adjustable resetting ratio 0.910 ÷ 0.985
Undervoltage protection [VT-0, VT-2, VT-3]
Line-to-line operating voltage of undervoltage protection U< 5 ÷ 130 V
Internal operate time for 2-fold value of exceeded setting 20 ÷ 50 ms (typical 35 ms)
Adjustable resetting ratio 1.015 ÷ 1.059
Under and overfrequency protection
Minimum voltage threshold of protection start-up f< and f> 18 V
Internal operate time for 2-fold value of exceeded setting 60 ÷ 85 ms (typical 65 ms)
Adjustable resetting ratio for f> and f< 0.05 Hz
Measurement range 45 – 55 Hz
Frequency measurement deviation +- 3 mHz max.
df/dt frequency derivative protection (ROCOF)
Minimum voltage threshold of protection start-up df/dt 18 V
Internal operate time for 2-fold value exceeded threshold 60 ÷ 85 ms (typical 65 ms)
Adjustable resetting ratio for f< 0.910 ÷ 0.985
Measurement range 0.1 – 25 Hz/s
Protection against contact lost with power grid (
Vector Shift )
Recognized vector shift of line-to-line voltage vectors (in 3-phase)
within the range 0 to 60° with an accuracy of 0.5°; adjustable within 1 - 25°
Internal operate time
app. 30 ms